diff --git a/src/compare/diff.rs b/src/compare/diff.rs
index 5c42e7d4..6f624e9b 100644
--- a/src/compare/diff.rs
+++ b/src/compare/diff.rs
@@ -60,6 +60,7 @@ pub fn compare_document<'s>(
                 return Err("Section cannot be after the first child of document.".into());
             }
             child_status.push(compare_section(
+                rust.source,
                 token,
                 rust.zeroth_section
                     .as_ref()
@@ -71,7 +72,7 @@ pub fn compare_document<'s>(
                 .iter()
                 .nth(i - rust.zeroth_section.as_ref().map(|_| 1).unwrap_or(0))
                 .ok_or("Should have a corresponding heading.")?;
-            child_status.push(compare_heading(token, rust)?);
+            child_status.push(compare_heading(rust.source, token, rust)?);
         } else {
             return Err("Document should only contain sections and headlines.".into());
         }
@@ -85,6 +86,7 @@ pub fn compare_document<'s>(
 }
 
 pub fn compare_section<'s>(
+    source: &'s str,
     emacs: &'s Token<'s>,
     rust: &'s Section<'s>,
 ) -> Result<DiffResult, Box<dyn std::error::Error>> {
@@ -104,6 +106,7 @@ pub fn compare_section<'s>(
 }
 
 pub fn compare_heading<'s>(
+    source: &'s str,
     emacs: &'s Token<'s>,
     rust: &'s Document<'s>,
 ) -> Result<DiffResult, Box<dyn std::error::Error>> {